import type { Tool } from '@wrongstack/core/types';
export type GrepOutputMode = 'content' | 'files_with_matches' | 'count';
export type GrepEngine = 'rg' | 'native';
export type GrepBackend = GrepEngine;
export interface GrepInput {
    pattern: string;
    path?: string | undefined;
    glob?: string | undefined;
    output_mode?: GrepOutputMode | undefined;
    context_lines?: number | undefined;
    case_insensitive?: boolean | undefined;
    limit?: number | undefined;
}
export interface GrepOutput {
    matches: string[];
    count: number;
    truncated: boolean;
    used: GrepEngine;
}
export declare const grepTool: Tool<GrepInput, GrepOutput>;
/** Test-only: forget the cached rg availability so mocks can vary per test. */
export declare function __resetRgDetectionForTests(): void;
/** Test-only: explicitly set rg availability to test both engines. */
export declare function __setRgAvailableForTests(available: boolean | undefined): void;
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